>There is a cheap option that I use. It does indeed put people off
>copying, I've used it so. As soon as possible, put your idea or
>any documentation on a prototype in a registered envelope and
>post it to yourself. Do not open it when you get it. In NZ this is
>evidence that can be used to establish originality.

Another way of doing this I have heard of is to give (or post) it to your
lawyer (probably need to advise them it is coming first) so they can stamp
it with a date of receipt and then hold it for you. This way they are an
independent witness (possibly with more legal clout than you) of the date
concerned.

If your lawyer can then produce the unopened package in court that they have
been holding on your behalf with a date stamp it may be more believable that
the date is correct, and the package has not been tampered with because it
has been held by the independent party.

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